In the far-off future of Equestria, the princesses haven't left the royal castle in two hundred years, business owns politics, and most of the pony population is addicted to the delicious and enticing drug known asNectar. When Treetop, a young pegasus ecologist, visits the teeming metropolis of Canterlot, an accident launches him on a journey where he discovers the secrets of the city's mysterious underworld.